From 3562e78743202e43aec8727005182a2558117eca Mon Sep 17 00:00:00 2001 From: marha Date: Sun, 28 Jun 2009 22:07:26 +0000 Subject: Checked in the following released items: xkeyboard-config-1.4.tar.gz ttf-bitstream-vera-1.10.tar.gz font-alias-1.0.1.tar.gz font-sun-misc-1.0.0.tar.gz font-sun-misc-1.0.0.tar.gz font-sony-misc-1.0.0.tar.gz font-schumacher-misc-1.0.0.tar.gz font-mutt-misc-1.0.0.tar.gz font-misc-misc-1.0.0.tar.gz font-misc-meltho-1.0.0.tar.gz font-micro-misc-1.0.0.tar.gz font-jis-misc-1.0.0.tar.gz font-isas-misc-1.0.0.tar.gz font-dec-misc-1.0.0.tar.gz font-daewoo-misc-1.0.0.tar.gz font-cursor-misc-1.0.0.tar.gz font-arabic-misc-1.0.0.tar.gz font-winitzki-cyrillic-1.0.0.tar.gz font-misc-cyrillic-1.0.0.tar.gz font-cronyx-cyrillic-1.0.0.tar.gz font-screen-cyrillic-1.0.1.tar.gz font-xfree86-type1-1.0.1.tar.gz font-adobe-utopia-type1-1.0.1.tar.gz font-ibm-type1-1.0.0.tar.gz font-bitstream-type1-1.0.0.tar.gz font-bitstream-speedo-1.0.0.tar.gz font-bh-ttf-1.0.0.tar.gz font-bh-type1-1.0.0.tar.gz font-bitstream-100dpi-1.0.0.tar.gz font-bh-lucidatypewriter-100dpi-1.0.0.tar.gz font-bh-100dpi-1.0.0.tar.gz font-adobe-utopia-100dpi-1.0.1.tar.gz font-adobe-100dpi-1.0.0.tar.gz font-util-1.0.1.tar.gz font-bitstream-75dpi-1.0.0.tar.gz font-bh-lucidatypewriter-75dpi-1.0.0.tar.gz font-adobe-utopia-75dpi-1.0.1.tar.gz font-bh-75dpi-1.0.0.tar.gz bdftopcf-1.0.1.tar.gz font-adobe-75dpi-1.0.0.tar.gz mkfontscale-1.0.6.tar.gz openssl-0.9.8k.tar.gz bigreqsproto-1.0.2.tar.gz xtrans-1.2.2.tar.gz resourceproto-1.0.2.tar.gz inputproto-1.4.4.tar.gz compositeproto-0.4.tar.gz damageproto-1.1.0.tar.gz zlib-1.2.3.tar.gz xkbcomp-1.0.5.tar.gz freetype-2.3.9.tar.gz pthreads-w32-2-8-0-release.tar.gz pixman-0.12.0.tar.gz kbproto-1.0.3.tar.gz evieext-1.0.2.tar.gz fixesproto-4.0.tar.gz recordproto-1.13.2.tar.gz randrproto-1.2.2.tar.gz scrnsaverproto-1.1.0.tar.gz renderproto-0.9.3.tar.gz xcmiscproto-1.1.2.tar.gz fontsproto-2.0.2.tar.gz xextproto-7.0.3.tar.gz xproto-7.0.14.tar.gz libXdmcp-1.0.2.tar.gz libxkbfile-1.0.5.tar.gz libfontenc-1.0.4.tar.gz libXfont-1.3.4.tar.gz libX11-1.1.5.tar.gz libXau-1.0.4.tar.gz libxcb-1.1.tar.gz xorg-server-1.5.3.tar.gz --- xorg-server/Xext/shm.c | 1309 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1309 insertions(+) create mode 100644 xorg-server/Xext/shm.c (limited to 'xorg-server/Xext/shm.c') diff --git a/xorg-server/Xext/shm.c b/xorg-server/Xext/shm.c new file mode 100644 index 000000000..34c875274 --- /dev/null +++ b/xorg-server/Xext/shm.c @@ -0,0 +1,1309 @@ +/************************************************************ + +Copyright 1989, 1998 The Open Group + +Permission to use, copy, modify, distribute, and sell this software and its +documentation for any purpose is hereby granted without fee, provided that +the above copyright notice appear in all copies and that both that +copyright notice and this permission notice appear in supporting +documentation. + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN +AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +Except as contained in this notice, the name of The Open Group shall not be +used in advertising or otherwise to promote the sale, use or other dealings +in this Software without prior written authorization from The Open Group. + +********************************************************/ + +/* THIS IS NOT AN X CONSORTIUM STANDARD OR AN X PROJECT TEAM SPECIFICATION */ + + +#define SHM + +#ifdef HAVE_DIX_CONFIG_H +#include +#endif + +#include +#ifndef Lynx +#include +#include +#else +#include +#include +#endif +#include +#include +#define NEED_REPLIES +#define NEED_EVENTS +#include +#include +#include "misc.h" +#include "os.h" +#include "dixstruct.h" +#include "resource.h" +#include "scrnintstr.h" +#include "windowstr.h" +#include "pixmapstr.h" +#include "gcstruct.h" +#include "extnsionst.h" +#include "servermd.h" +#include "shmint.h" +#include "xace.h" +#define _XSHM_SERVER_ +#include +#include + +/* Needed for Solaris cross-zone shared memory extension */ +#ifdef HAVE_SHMCTL64 +#include +#define SHMSTAT(id, buf) shmctl64(id, IPC_STAT64, buf) +#define SHMSTAT_TYPE struct shmid_ds64 +#define SHMPERM_TYPE struct ipc_perm64 +#define SHM_PERM(buf) buf.shmx_perm +#define SHM_SEGSZ(buf) buf.shmx_segsz +#define SHMPERM_UID(p) p->ipcx_uid +#define SHMPERM_CUID(p) p->ipcx_cuid +#define SHMPERM_GID(p) p->ipcx_gid +#define SHMPERM_CGID(p) p->ipcx_cgid +#define SHMPERM_MODE(p) p->ipcx_mode +#define SHMPERM_ZONEID(p) p->ipcx_zoneid +#else +#define SHMSTAT(id, buf) shmctl(id, IPC_STAT, buf) +#define SHMSTAT_TYPE struct shmid_ds +#define SHMPERM_TYPE struct ipc_perm +#define SHM_PERM(buf) buf.shm_perm +#define SHM_SEGSZ(buf) buf.shm_segsz +#define SHMPERM_UID(p) p->uid +#define SHMPERM_CUID(p) p->cuid +#define SHMPERM_GID(p) p->gid +#define SHMPERM_CGID(p) p->cgid +#define SHMPERM_MODE(p) p->mode +#endif + +#ifdef PANORAMIX +#include "panoramiX.h" +#include "panoramiXsrv.h" +#endif + +#include "modinit.h" + +typedef struct _ShmDesc { + struct _ShmDesc *next; + int shmid; + int refcnt; + char *addr; + Bool writable; + unsigned long size; +} ShmDescRec, *ShmDescPtr; + +static PixmapPtr fbShmCreatePixmap(XSHM_CREATE_PIXMAP_ARGS); +static int ShmDetachSegment( + pointer /* value */, + XID /* shmseg */ + ); +static void ShmResetProc( + ExtensionEntry * /* extEntry */ + ); +static void SShmCompletionEvent( + xShmCompletionEvent * /* from */, + xShmCompletionEvent * /* to */ + ); + +static Bool ShmDestroyPixmap (PixmapPtr pPixmap); + +static DISPATCH_PROC(ProcShmAttach); +static DISPATCH_PROC(ProcShmCreatePixmap); +static DISPATCH_PROC(ProcShmDetach); +static DISPATCH_PROC(ProcShmDispatch); +static DISPATCH_PROC(ProcShmGetImage); +static DISPATCH_PROC(ProcShmPutImage); +static DISPATCH_PROC(ProcShmQueryVersion); +static DISPATCH_PROC(SProcShmAttach); +static DISPATCH_PROC(SProcShmCreatePixmap); +static DISPATCH_PROC(SProcShmDetach); +static DISPATCH_PROC(SProcShmDispatch); +static DISPATCH_PROC(SProcShmGetImage); +static DISPATCH_PROC(SProcShmPutImage); +static DISPATCH_PROC(SProcShmQueryVersion); + +static unsigned char ShmReqCode; +_X_EXPORT int ShmCompletionCode; +_X_EXPORT int BadShmSegCode; +_X_EXPORT RESTYPE ShmSegType; +static ShmDescPtr Shmsegs; +static Bool sharedPixmaps; +static int pixmapFormat; +static int shmPixFormat[MAXSCREENS]; +static ShmFuncsPtr shmFuncs[MAXSCREENS]; +static DestroyPixmapProcPtr destroyPixmap[MAXSCREENS]; +static DevPrivateKey shmPixmapPrivate = &shmPixmapPrivate; +static ShmFuncs miFuncs = {NULL, NULL}; +static ShmFuncs fbFuncs = {fbShmCreatePixmap, NULL}; + +#define VERIFY_SHMSEG(shmseg,shmdesc,client) \ +{ \ + shmdesc = (ShmDescPtr)LookupIDByType(shmseg, ShmSegType); \ + if (!shmdesc) \ + { \ + client->errorValue = shmseg; \ + return BadShmSegCode; \ + } \ +} + +#define VERIFY_SHMPTR(shmseg,offset,needwrite,shmdesc,client) \ +{ \ + VERIFY_SHMSEG(shmseg, shmdesc, client); \ + if ((offset & 3) || (offset > shmdesc->size)) \ + { \ + client->errorValue = offset; \ + return BadValue; \ + } \ + if (needwrite && !shmdesc->writable) \ + return BadAccess; \ +} + +#define VERIFY_SHMSIZE(shmdesc,offset,len,client) \ +{ \ + if ((offset + len) > shmdesc->size) \ + { \ + return BadAccess; \ + } \ +} + + +#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__CYGWIN__) || defined(__DragonFly__) +#include + +static Bool badSysCall = FALSE; + +static void +SigSysHandler(signo) +int signo; +{ + badSysCall = TRUE; +} + +static Bool CheckForShmSyscall() +{ + void (*oldHandler)(); + int shmid = -1; + + /* If no SHM support in the kernel, the bad syscall will generate SIGSYS */ + oldHandler = signal(SIGSYS, SigSysHandler); + + badSysCall = FALSE; + shmid = shmget(IPC_PRIVATE, 4096, IPC_CREAT); + + if (shmid != -1) + { + /* Successful allocation - clean up */ + shmctl(shmid, IPC_RMID, (struct shmid_ds *)NULL); + } + else + { + /* Allocation failed */ + badSysCall = TRUE; + } + signal(SIGSYS, oldHandler); + return(!badSysCall); +} + +#define MUST_CHECK_FOR_SHM_SYSCALL + +#endif + +void +ShmExtensionInit(INITARGS) +{ + ExtensionEntry *extEntry; + int i; + +#ifdef MUST_CHECK_FOR_SHM_SYSCALL + if (!CheckForShmSyscall()) + { + ErrorF("MIT-SHM extension disabled due to lack of kernel support\n"); + return; + } +#endif + + sharedPixmaps = xFalse; + pixmapFormat = 0; + { + sharedPixmaps = xTrue; + pixmapFormat = shmPixFormat[0]; + for (i = 0; i < screenInfo.numScreens; i++) + { + if (!shmFuncs[i]) + shmFuncs[i] = &miFuncs; + if (!shmFuncs[i]->CreatePixmap) + sharedPixmaps = xFalse; + if (shmPixFormat[i] && (shmPixFormat[i] != pixmapFormat)) + { + sharedPixmaps = xFalse; + pixmapFormat = 0; + } + } + if (!pixmapFormat) + pixmapFormat = ZPixmap; + if (sharedPixmaps) + for (i = 0; i < screenInfo.numScreens; i++) + { + destroyPixmap[i] = screenInfo.screens[i]->DestroyPixmap; + screenInfo.screens[i]->DestroyPixmap = ShmDestroyPixmap; + } + } + ShmSegType = CreateNewResourceType(ShmDetachSegment); + if (ShmSegType && + (extEntry = AddExtension(SHMNAME, ShmNumberEvents, ShmNumberErrors, + ProcShmDispatch, SProcShmDispatch, + ShmResetProc, StandardMinorOpcode))) + { + ShmReqCode = (unsigned char)extEntry->base; + ShmCompletionCode = extEntry->eventBase; + BadShmSegCode = extEntry->errorBase; + EventSwapVector[ShmCompletionCode] = (EventSwapPtr) SShmCompletionEvent; + } +} + +/*ARGSUSED*/ +static void +ShmResetProc (extEntry) +ExtensionEntry *extEntry; +{ + int i; + + for (i = 0; i < MAXSCREENS; i++) + { + shmFuncs[i] = (ShmFuncsPtr)NULL; + shmPixFormat[i] = 0; + } +} + +void +ShmRegisterFuncs( + ScreenPtr pScreen, + ShmFuncsPtr funcs) +{ + shmFuncs[pScreen->myNum] = funcs; +} + +void +ShmSetPixmapFormat( + ScreenPtr pScreen, + int format) +{ + shmPixFormat[pScreen->myNum] = format; +} + +static Bool +ShmDestroyPixmap (PixmapPtr pPixmap) +{ + ScreenPtr pScreen = pPixmap->drawable.pScreen; + Bool ret; + if (pPixmap->refcnt == 1) + { + ShmDescPtr shmdesc; + shmdesc = (ShmDescPtr)dixLookupPrivate(&pPixmap->devPrivates, + shmPixmapPrivate); + if (shmdesc) + ShmDetachSegment ((pointer) shmdesc, pPixmap->drawable.id); + } + + pScreen->DestroyPixmap = destroyPixmap[pScreen->myNum]; + ret = (*pScreen->DestroyPixmap) (pPixmap); + destroyPixmap[pScreen->myNum] = pScreen->DestroyPixmap; + pScreen->DestroyPixmap = ShmDestroyPixmap; + return ret; +} + +void +ShmRegisterFbFuncs(pScreen) + ScreenPtr pScreen; +{ + shmFuncs[pScreen->myNum] = &fbFuncs; +} + +static int +ProcShmQueryVersion(client) + register ClientPtr client; +{ + xShmQueryVersionReply rep; + register int n; + + REQUEST_SIZE_MATCH(xShmQueryVersionReq); + rep.type = X_Reply; + rep.length = 0; + rep.sequenceNumber = client->sequence; + rep.sharedPixmaps = sharedPixmaps; + rep.pixmapFormat = pixmapFormat; + rep.majorVersion = SHM_MAJOR_VERSION; + rep.minorVersion = SHM_MINOR_VERSION; + rep.uid = geteuid(); + rep.gid = getegid(); + if (client->swapped) { + swaps(&rep.sequenceNumber, n); + swapl(&rep.length, n); + swaps(&rep.majorVersion, n); + swaps(&rep.minorVersion, n); + swaps(&rep.uid, n); + swaps(&rep.gid, n); + } + WriteToClient(client, sizeof(xShmQueryVersionReply), (char *)&rep); + return (client->noClientException); +} + +/* + * Simulate the access() system call for a shared memory segement, + * using the credentials from the client if available + */ +static int +shm_access(ClientPtr client, SHMPERM_TYPE *perm, int readonly) +{ + int uid, gid; + mode_t mask; + int uidset = 0, gidset = 0; + LocalClientCredRec *lcc; + + if (GetLocalClientCreds(client, &lcc) != -1) { + + if (lcc->fieldsSet & LCC_UID_SET) { + uid = lcc->euid; + uidset = 1; + } + if (lcc->fieldsSet & LCC_GID_SET) { + gid = lcc->egid; + gidset = 1; + } + +#if defined(HAVE_GETZONEID) && defined(SHMPERM_ZONEID) + if ( ((lcc->fieldsSet & LCC_ZID_SET) == 0) || (lcc->zoneid == -1) + || (lcc->zoneid != SHMPERM_ZONEID(perm))) { + uidset = 0; + gidset = 0; + } +#endif + FreeLocalClientCreds(lcc); + + if (uidset) { + /* User id 0 always gets access */ + if (uid == 0) { + return 0; + } + /* Check the owner */ + if (SHMPERM_UID(perm) == uid || SHMPERM_CUID(perm) == uid) { + mask = S_IRUSR; + if (!readonly) { + mask |= S_IWUSR; + } + return (SHMPERM_MODE(perm) & mask) == mask ? 0 : -1; + } + } + + if (gidset) { + /* Check the group */ + if (SHMPERM_GID(perm) == gid || SHMPERM_CGID(perm) == gid) { + mask = S_IRGRP; + if (!readonly) { + mask |= S_IWGRP; + } + return (SHMPERM_MODE(perm) & mask) == mask ? 0 : -1; + } + } + } + /* Otherwise, check everyone else */ + mask = S_IROTH; + if (!readonly) { + mask |= S_IWOTH; + } + return (SHMPERM_MODE(perm) & mask) == mask ? 0 : -1; +} + +static int +ProcShmAttach(client) + register ClientPtr client; +{ + SHMSTAT_TYPE buf; + ShmDescPtr shmdesc; + REQUEST(xShmAttachReq); + + REQUEST_SIZE_MATCH(xShmAttachReq); + LEGAL_NEW_RESOURCE(stuff->shmseg, client); + if ((stuff->readOnly != xTrue) && (stuff->readOnly != xFalse)) + { + client->errorValue = stuff->readOnly; + return(BadValue); + } + for (shmdesc = Shmsegs; + shmdesc && (shmdesc->shmid != stuff->shmid); + shmdesc = shmdesc->next) + ; + if (shmdesc) + { + if (!stuff->readOnly && !shmdesc->writable) + return BadAccess; + shmdesc->refcnt++; + } + else + { + shmdesc = (ShmDescPtr) xalloc(sizeof(ShmDescRec)); + if (!shmdesc) + return BadAlloc; + shmdesc->addr = shmat(stuff->shmid, 0, + stuff->readOnly ? SHM_RDONLY : 0); + if ((shmdesc->addr == ((char *)-1)) || + SHMSTAT(stuff->shmid, &buf)) + { + xfree(shmdesc); + return BadAccess; + } + + /* The attach was performed with root privs. We must + * do manual checking of access rights for the credentials + * of the client */ + + if (shm_access(client, &(SHM_PERM(buf)), stuff->readOnly) == -1) { + shmdt(shmdesc->addr); + xfree(shmdesc); + return BadAccess; + } + + shmdesc->shmid = stuff->shmid; + shmdesc->refcnt = 1; + shmdesc->writable = !stuff->readOnly; + shmdesc->size = SHM_SEGSZ(buf); + shmdesc->next = Shmsegs; + Shmsegs = shmdesc; + } + if (!AddResource(stuff->shmseg, ShmSegType, (pointer)shmdesc)) + return BadAlloc; + return(client->noClientException); +} + +/*ARGSUSED*/ +static int +ShmDetachSegment(value, shmseg) + pointer value; /* must conform to DeleteType */ + XID shmseg; +{ + ShmDescPtr shmdesc = (ShmDescPtr)value; + ShmDescPtr *prev; + + if (--shmdesc->refcnt) + return TRUE; + shmdt(shmdesc->addr); + for (prev = &Shmsegs; *prev != shmdesc; prev = &(*prev)->next) + ; + *prev = shmdesc->next; + xfree(shmdesc); + return Success; +} + +static int +ProcShmDetach(client) + register ClientPtr client; +{ + ShmDescPtr shmdesc; + REQUEST(xShmDetachReq); + + REQUEST_SIZE_MATCH(xShmDetachReq); + VERIFY_SHMSEG(stuff->shmseg, shmdesc, client); + FreeResource(stuff->shmseg, RT_NONE); + return(client->noClientException); +} + +/* + * If the given request doesn't exactly match PutImage's constraints, + * wrap the image in a scratch pixmap header and let CopyArea sort it out. + */ +static void +doShmPutImage(DrawablePtr dst, GCPtr pGC, + int depth, unsigned int format, + int w, int h, int sx, int sy, int sw, int sh, int dx, int dy, + char *data) +{ + PixmapPtr pPixmap; + + pPixmap = GetScratchPixmapHeader(dst->pScreen, w, h, depth, + BitsPerPixel(depth), + PixmapBytePad(w, depth), + data); + if (!pPixmap) + return; + pGC->ops->CopyArea((DrawablePtr)pPixmap, dst, pGC, sx, sy, sw, sh, dx, dy); + FreeScratchPixmapHeader(pPixmap); +} + +#ifdef PANORAMIX +static int +ProcPanoramiXShmPutImage(register ClientPtr client) +{ + int j, result = 0, orig_x, orig_y; + PanoramiXRes *draw, *gc; + Bool sendEvent, isRoot; + + REQUEST(xShmPutImageReq); + REQUEST_SIZE_MATCH(xShmPutImageReq); + + if(!(draw = (PanoramiXRes *)SecurityLookupIDByClass( + client, stuff->drawable, XRC_DRAWABLE, DixWriteAccess))) + return BadDrawable; + + if(!(gc = (PanoramiXRes *)SecurityLookupIDByType( + client, stuff->gc, XRT_GC, DixReadAccess))) + return BadGC; + + isRoot = (draw->type == XRT_WINDOW) && draw->u.win.root; + + orig_x = stuff->dstX; + orig_y = stuff->dstY; + sendEvent = stuff->sendEvent; + stuff->sendEvent = 0; + FOR_NSCREENS(j) { + if(!j) stuff->sendEvent = sendEvent; + stuff->drawable = draw->info[j].id; + stuff->gc = gc->info[j].id; + if (isRoot) { + stuff->dstX = orig_x - panoramiXdataPtr[j].x; + stuff->dstY = orig_y - panoramiXdataPtr[j].y; + } + result = ProcShmPutImage(client); + if(result != client->noClientException) break; + } + return(result); +} + +static int +ProcPanoramiXShmGetImage(ClientPtr client) +{ + PanoramiXRes *draw; + DrawablePtr drawables[MAXSCREENS]; + DrawablePtr pDraw; + xShmGetImageReply xgi; + ShmDescPtr shmdesc; + int i, x, y, w, h, format, rc; + Mask plane = 0, planemask; + long lenPer = 0, length, widthBytesLine; + Bool isRoot; + + REQUEST(xShmGetImageReq); + + REQUEST_SIZE_MATCH(xShmGetImageReq); + + if ((stuff->format != XYPixmap) && (stuff->format != ZPixmap)) { + client->errorValue = stuff->format; + return(BadValue); + } + + if(!(draw = (PanoramiXRes *)SecurityLookupIDByClass( + client, stuff->drawable, XRC_DRAWABLE, DixWriteAccess))) + return BadDrawable; + + if (draw->type == XRT_PIXMAP) + return ProcShmGetImage(client); + + rc = dixLookupDrawable(&pDraw, stuff->drawable, client, 0, + DixReadAccess); + if (rc != Success) + return rc; + + VERIFY_SHMPTR(stuff->shmseg, stuff->offset, TRUE, shmdesc, client); + + x = stuff->x; + y = stuff->y; + w = stuff->width; + h = stuff->height; + format = stuff->format; + planemask = stuff->planeMask; + + isRoot = (draw->type == XRT_WINDOW) && draw->u.win.root; + + if(isRoot) { + if( /* check for being onscreen */ + x < 0 || x + w > PanoramiXPixWidth || + y < 0 || y + h > PanoramiXPixHeight ) + return(BadMatch); + } else { + if( /* check for being onscreen */ + panoramiXdataPtr[0].x + pDraw->x + x < 0 || + panoramiXdataPtr[0].x + pDraw->x + x + w > PanoramiXPixWidth || + panoramiXdataPtr[0].y + pDraw->y + y < 0 || + panoramiXdataPtr[0].y + pDraw->y + y + h > PanoramiXPixHeight || + /* check for being inside of border */ + x < - wBorderWidth((WindowPtr)pDraw) || + x + w > wBorderWidth((WindowPtr)pDraw) + (int)pDraw->width || + y < -wBorderWidth((WindowPtr)pDraw) || + y + h > wBorderWidth ((WindowPtr)pDraw) + (int)pDraw->height) + return(BadMatch); + } + + drawables[0] = pDraw; + for(i = 1; i < PanoramiXNumScreens; i++) { + rc = dixLookupDrawable(drawables+i, draw->info[i].id, client, 0, + DixReadAccess); + if (rc != Success) + return rc; + } + + xgi.visual = wVisual(((WindowPtr)pDraw)); + xgi.type = X_Reply; + xgi.length = 0; + xgi.sequenceNumber = client->sequence; + xgi.depth = pDraw->depth; + + if(format == ZPixmap) { + widthBytesLine = PixmapBytePad(w, pDraw->depth); + length = widthBytesLine * h; + } else { + widthBytesLine = PixmapBytePad(w, 1); + lenPer = widthBytesLine * h; + plane = ((Mask)1) << (pDraw->depth - 1); + length = lenPer * Ones(planemask & (plane | (plane - 1))); + } + + VERIFY_SHMSIZE(shmdesc, stuff->offset, length, client); + xgi.size = length; + + if (length == 0) {/* nothing to do */ } + else if (format == ZPixmap) { + XineramaGetImageData(drawables, x, y, w, h, format, planemask, + shmdesc->addr + stuff->offset, + widthBytesLine, isRoot); + } else { + + length = stuff->offset; + for (; plane; plane >>= 1) { + if (planemask & plane) { + XineramaGetImageData(drawables, x, y, w, h, + format, plane, shmdesc->addr + length, + widthBytesLine, isRoot); + length += lenPer; + } + } + } + + if (client->swapped) { + register int n; + swaps(&xgi.sequenceNumber, n); + swapl(&xgi.length, n); + swapl(&xgi.visual, n); + swapl(&xgi.size, n); + } + WriteToClient(client, sizeof(xShmGetImageReply), (char *)&xgi); + + return(client->noClientException); +} + +static int +ProcPanoramiXShmCreatePixmap( + register ClientPtr client) +{ + ScreenPtr pScreen = NULL; + PixmapPtr pMap = NULL; + DrawablePtr pDraw; + DepthPtr pDepth; + int i, j, result, rc; + ShmDescPtr shmdesc; + REQUEST(xShmCreatePixmapReq); + unsigned int width, height, depth; + unsigned long size; + PanoramiXRes *newPix; + + REQUEST_SIZE_MATCH(xShmCreatePixmapReq); + client->errorValue = stuff->pid; + if (!sharedPixmaps) + return BadImplementation; + LEGAL_NEW_RESOURCE(stuff->pid, client); + rc = dixLookupDrawable(&pDraw, stuff->drawable, client, M_ANY, + DixGetAttrAccess); + if (rc != Success) + return rc; + + VERIFY_SHMPTR(stuff->shmseg, stuff->offset, TRUE, shmdesc, client); + + width = stuff->width; + height = stuff->height; + depth = stuff->depth; + if (!width || !height || !depth) + { + client->errorValue = 0; + return BadValue; + } + if (width > 32767 || height > 32767) + return BadAlloc; + + if (stuff->depth != 1) + { + pDepth = pDraw->pScreen->allowedDepths; + for (i=0; ipScreen->numDepths; i++, pDepth++) + if (pDepth->depth == stuff->depth) + goto CreatePmap; + client->errorValue = stuff->depth; + return BadValue; + } + +CreatePmap: + size = PixmapBytePad(width, depth) * height; + if (sizeof(size) == 4 && BitsPerPixel(depth) > 8) { + if (size < width * height) + return BadAlloc; + } + /* thankfully, offset is unsigned */ + if (stuff->offset + size < size) + return BadAlloc; + + VERIFY_SHMSIZE(shmdesc, stuff->offset, size, client); + + if(!(newPix = (PanoramiXRes *) xalloc(sizeof(PanoramiXRes)))) + return BadAlloc; + + newPix->type = XRT_PIXMAP; + newPix->u.pix.shared = TRUE; + newPix->info[0].id = stuff->pid; + for(j = 1; j < PanoramiXNumScreens; j++) + newPix->info[j].id = FakeClientID(client->index); + + result = (client->noClientException); + + FOR_NSCREENS(j) { + pScreen = screenInfo.screens[j]; + + pMap = (*shmFuncs[j]->CreatePixmap)(pScreen, + stuff->width, stuff->height, stuff->depth, + shmdesc->addr + stuff->offset); + + if (pMap) { + dixSetPrivate(&pMap->devPrivates, shmPixmapPrivate, shmdesc); + shmdesc->refcnt++; + pMap->drawable.serialNumber = NEXT_SERIAL_NUMBER; + pMap->drawable.id = newPix->info[j].id; + if (!AddResource(newPix->info[j].id, RT_PIXMAP, (pointer)pMap)) { + (*pScreen->DestroyPixmap)(pMap); + result = BadAlloc; + break; + } + } else { + result = BadAlloc; + break; + } + } + + if(result == BadAlloc) { + while(j--) { + (*pScreen->DestroyPixmap)(pMap); + FreeResource(newPix->info[j].id, RT_NONE); + } + xfree(newPix); + } else + AddResource(stuff->pid, XRT_PIXMAP, newPix); + + return result; +} + +#endif + +static int +ProcShmPutImage(client) + register ClientPtr client; +{ + GCPtr pGC; + DrawablePtr pDraw; + long length; + ShmDescPtr shmdesc; + REQUEST(xShmPutImageReq); + + REQUEST_SIZE_MATCH(xShmPutImageReq); + VALIDATE_DRAWABLE_AND_GC(stuff->drawable, pDraw, DixWriteAccess); + VERIFY_SHMPTR(stuff->shmseg, stuff->offset, FALSE, shmdesc, client); + if ((stuff->sendEvent != xTrue) && (stuff->sendEvent != xFalse)) + return BadValue; + if (stuff->format == XYBitmap) + { + if (stuff->depth != 1) + return BadMatch; + length = PixmapBytePad(stuff->totalWidth, 1); + } + else if (stuff->format == XYPixmap) + { + if (pDraw->depth != stuff->depth) + return BadMatch; + length = PixmapBytePad(stuff->totalWidth, 1); + length *= stuff->depth; + } + else if (stuff->format == ZPixmap) + { + if (pDraw->depth != stuff->depth) + return BadMatch; + length = PixmapBytePad(stuff->totalWidth, stuff->depth); + } + else + { + client->errorValue = stuff->format; + return BadValue; + } + + /* + * There's a potential integer overflow in this check: + * VERIFY_SHMSIZE(shmdesc, stuff->offset, length * stuff->totalHeight, + * client); + * the version below ought to avoid it + */ + if (stuff->totalHeight != 0 && + length > (shmdesc->size - stuff->offset)/stuff->totalHeight) { + client->errorValue = stuff->totalWidth; + return BadValue; + } + if (stuff->srcX > stuff->totalWidth) + { + client->errorValue = stuff->srcX; + return BadValue; + } + if (stuff->srcY > stuff->totalHeight) + { + client->errorValue = stuff->srcY; + return BadValue; + } + if ((stuff->srcX + stuff->srcWidth) > stuff->totalWidth) + { + client->errorValue = stuff->srcWidth; + return BadValue; + } + if ((stuff->srcY + stuff->srcHeight) > stuff->totalHeight) + { + client->errorValue = stuff->srcHeight; + return BadValue; + } + + if ((((stuff->format == ZPixmap) && (stuff->srcX == 0)) || + ((stuff->format != ZPixmap) && + (stuff->srcX < screenInfo.bitmapScanlinePad) && + ((stuff->format == XYBitmap) || + ((stuff->srcY == 0) && + (stuff->srcHeight == stuff->totalHeight))))) && + ((stuff->srcX + stuff->srcWidth) == stuff->totalWidth)) + (*pGC->ops->PutImage) (pDraw, pGC, stuff->depth, + stuff->dstX, stuff->dstY, + stuff->totalWidth, stuff->srcHeight, + stuff->srcX, stuff->format, + shmdesc->addr + stuff->offset + + (stuff->srcY * length)); + else + doShmPutImage(pDraw, pGC, stuff->depth, stuff->format, + stuff->totalWidth, stuff->totalHeight, + stuff->srcX, stuff->srcY, + stuff->srcWidth, stuff->srcHeight, + stuff->dstX, stuff->dstY, + shmdesc->addr + stuff->offset); + + if (stuff->sendEvent) + { + xShmCompletionEvent ev; + + ev.type = ShmCompletionCode; + ev.drawable = stuff->drawable; + ev.sequenceNumber = client->sequence; + ev.minorEvent = X_ShmPutImage; + ev.majorEvent = ShmReqCode; + ev.shmseg = stuff->shmseg; + ev.offset = stuff->offset; + WriteEventsToClient(client, 1, (xEvent *) &ev); + } + + return (client->noClientException); +} + + + +static int +ProcShmGetImage(client) + register ClientPtr client; +{ + DrawablePtr pDraw; + long lenPer = 0, length; + Mask plane = 0; + xShmGetImageReply xgi; + ShmDescPtr shmdesc; + int n, rc; + + REQUEST(xShmGetImageReq); + + REQUEST_SIZE_MATCH(xShmGetImageReq); + if ((stuff->format != XYPixmap) && (stuff->format != ZPixmap)) + { + client->errorValue = stuff->format; + return(BadValue); + } + rc = dixLookupDrawable(&pDraw, stuff->drawable, client, 0, + DixReadAccess); + if (rc != Success) + return rc; + VERIFY_SHMPTR(stuff->shmseg, stuff->offset, TRUE, shmdesc, client); + if (pDraw->type == DRAWABLE_WINDOW) + { + if( /* check for being viewable */ + !((WindowPtr) pDraw)->realized || + /* check for being on screen */ + pDraw->x + stuff->x < 0 || + pDraw->x + stuff->x + (int)stuff->width > pDraw->pScreen->width || + pDraw->y + stuff->y < 0 || + pDraw->y + stuff->y + (int)stuff->height > pDraw->pScreen->height || + /* check for being inside of border */ + stuff->x < - wBorderWidth((WindowPtr)pDraw) || + stuff->x + (int)stuff->width > + wBorderWidth((WindowPtr)pDraw) + (int)pDraw->width || + stuff->y < -wBorderWidth((WindowPtr)pDraw) || + stuff->y + (int)stuff->height > + wBorderWidth((WindowPtr)pDraw) + (int)pDraw->height + ) + return(BadMatch); + xgi.visual = wVisual(((WindowPtr)pDraw)); + } + else + { + if (stuff->x < 0 || + stuff->x+(int)stuff->width > pDraw->width || + stuff->y < 0 || + stuff->y+(int)stuff->height > pDraw->height + ) + return(BadMatch); + xgi.visual = None; + } + xgi.type = X_Reply; + xgi.length = 0; + xgi.sequenceNumber = client->sequence; + xgi.depth = pDraw->depth; + if(stuff->format == ZPixmap) + { + length = PixmapBytePad(stuff->width, pDraw->depth) * stuff->height; + } + else + { + lenPer = PixmapBytePad(stuff->width, 1) * stuff->height; + plane = ((Mask)1) << (pDraw->depth - 1); + /* only planes asked for */ + length = lenPer * Ones(stuff->planeMask & (plane | (plane - 1))); + } + + VERIFY_SHMSIZE(shmdesc, stuff->offset, length, client); + xgi.size = length; + + if (length == 0) + { + /* nothing to do */ + } + else if (stuff->format == ZPixmap) + { + (*pDraw->pScreen->GetImage)(pDraw, stuff->x, stuff->y, + stuff->width, stuff->height, + stuff->format, stuff->planeMask, + shmdesc->addr + stuff->offset); + } + else + { + + length = stuff->offset; + for (; plane; plane >>= 1) + { + if (stuff->planeMask & plane) + { + (*pDraw->pScreen->GetImage)(pDraw, + stuff->x, stuff->y, + stuff->width, stuff->height, + stuff->format, plane, + shmdesc->addr + length); + length += lenPer; + } + } + } + + if (client->swapped) { + swaps(&xgi.sequenceNumber, n); + swapl(&xgi.length, n); + swapl(&xgi.visual, n); + swapl(&xgi.size, n); + } + WriteToClient(client, sizeof(xShmGetImageReply), (char *)&xgi); + + return(client->noClientException); +} + +static PixmapPtr +fbShmCreatePixmap (pScreen, width, height, depth, addr) + ScreenPtr pScreen; + int width; + int height; + int depth; + char *addr; +{ + register PixmapPtr pPixmap; + + pPixmap = (*pScreen->CreatePixmap)(pScreen, 0, 0, pScreen->rootDepth, 0); + if (!pPixmap) + return NullPixmap; + + if (!(*pScreen->ModifyPixmapHeader)(pPixmap, width, height, depth, + BitsPerPixel(depth), PixmapBytePad(width, depth), (pointer)addr)) { + (*pScreen->DestroyPixmap)(pPixmap); + return NullPixmap; + } + return pPixmap; +} + +static int +ProcShmCreatePixmap(client) + register ClientPtr client; +{ + PixmapPtr pMap; + DrawablePtr pDraw; + DepthPtr pDepth; + register int i, rc; + ShmDescPtr shmdesc; + REQUEST(xShmCreatePixmapReq); + unsigned int width, height, depth; + unsigned long size; + + REQUEST_SIZE_MATCH(xShmCreatePixmapReq); + client->errorValue = stuff->pid; + if (!sharedPixmaps) + return BadImplementation; + LEGAL_NEW_RESOURCE(stuff->pid, client); + rc = dixLookupDrawable(&pDraw, stuff->drawable, client, M_ANY, + DixGetAttrAccess); + if (rc != Success) + return rc; + + VERIFY_SHMPTR(stuff->shmseg, stuff->offset, TRUE, shmdesc, client); + + width = stuff->width; + height = stuff->height; + depth = stuff->depth; + if (!width || !height || !depth) + { + client->errorValue = 0; + return BadValue; + } + if (width > 32767 || height > 32767) + return BadAlloc; + + if (stuff->depth != 1) + { + pDepth = pDraw->pScreen->allowedDepths; + for (i=0; ipScreen->numDepths; i++, pDepth++) + if (pDepth->depth == stuff->depth) + goto CreatePmap; + client->errorValue = stuff->depth; + return BadValue; + } + +CreatePmap: + size = PixmapBytePad(width, depth) * height; + if (sizeof(size) == 4 && BitsPerPixel(depth) > 8) { + if (size < width * height) + return BadAlloc; + } + /* thankfully, offset is unsigned */ + if (stuff->offset + size < size) + return BadAlloc; + + VERIFY_SHMSIZE(shmdesc, stuff->offset, size, client); + pMap = (*shmFuncs[pDraw->pScreen->myNum]->CreatePixmap)( + pDraw->pScreen, stuff->width, + stuff->height, stuff->depth, + shmdesc->addr + stuff->offset); + if (pMap) + { + rc = XaceHook(XACE_RESOURCE_ACCESS, client, stuff->pid, RT_PIXMAP, + pMap, RT_NONE, NULL, DixCreateAccess); + if (rc != Success) { + pDraw->pScreen->DestroyPixmap(pMap); + return rc; + } + dixSetPrivate(&pMap->devPrivates, shmPixmapPrivate, shmdesc); + shmdesc->refcnt++; + pMap->drawable.serialNumber = NEXT_SERIAL_NUMBER; + pMap->drawable.id = stuff->pid; + if (AddResource(stuff->pid, RT_PIXMAP, (pointer)pMap)) + { + return(client->noClientException); + } + pDraw->pScreen->DestroyPixmap(pMap); + } + return (BadAlloc); +} + +static int +ProcShmDispatch (client) + register ClientPtr client; +{ + REQUEST(xReq); + switch (stuff->data) + { + case X_ShmQueryVersion: + return ProcShmQueryVersion(client); + case X_ShmAttach: + return ProcShmAttach(client); + case X_ShmDetach: + return ProcShmDetach(client); + case X_ShmPutImage: +#ifdef PANORAMIX + if ( !noPanoramiXExtension ) + return ProcPanoramiXShmPutImage(client); +#endif + return ProcShmPutImage(client); + case X_ShmGetImage: +#ifdef PANORAMIX + if ( !noPanoramiXExtension ) + return ProcPanoramiXShmGetImage(client); +#endif + return ProcShmGetImage(client); + case X_ShmCreatePixmap: +#ifdef PANORAMIX + if ( !noPanoramiXExtension ) + return ProcPanoramiXShmCreatePixmap(client); +#endif + return ProcShmCreatePixmap(client); + default: + return BadRequest; + } +} + +static void +SShmCompletionEvent(from, to) + xShmCompletionEvent *from, *to; +{ + to->type = from->type; + cpswaps(from->sequenceNumber, to->sequenceNumber); + cpswapl(from->drawable, to->drawable); + cpswaps(from->minorEvent, to->minorEvent); + to->majorEvent = from->majorEvent; + cpswapl(from->shmseg, to->shmseg); + cpswapl(from->offset, to->offset); +} + +static int +SProcShmQueryVersion(client) + register ClientPtr client; +{ + register int n; + REQUEST(xShmQueryVersionReq); + + swaps(&stuff->length, n); + return ProcShmQueryVersion(client); +} + +static int +SProcShmAttach(client) + ClientPtr client; +{ + register int n; + REQUEST(xShmAttachReq); + swaps(&stuff->length, n); + REQUEST_SIZE_MATCH(xShmAttachReq); + swapl(&stuff->shmseg, n); + swapl(&stuff->shmid, n); + return ProcShmAttach(client); +} + +static int +SProcShmDetach(client) + ClientPtr client; +{ + register int n; + REQUEST(xShmDetachReq); + swaps(&stuff->length, n); + REQUEST_SIZE_MATCH(xShmDetachReq); + swapl(&stuff->shmseg, n); + return ProcShmDetach(client); +} + +static int +SProcShmPutImage(client) + ClientPtr client; +{ + register int n; + REQUEST(xShmPutImageReq); + swaps(&stuff->length, n); + REQUEST_SIZE_MATCH(xShmPutImageReq); + swapl(&stuff->drawable, n); + swapl(&stuff->gc, n); + swaps(&stuff->totalWidth, n); + swaps(&stuff->totalHeight, n); + swaps(&stuff->srcX, n); + swaps(&stuff->srcY, n); + swaps(&stuff->srcWidth, n); + swaps(&stuff->srcHeight, n); + swaps(&stuff->dstX, n); + swaps(&stuff->dstY, n); + swapl(&stuff->shmseg, n); + swapl(&stuff->offset, n); + return ProcShmPutImage(client); +} + +static int +SProcShmGetImage(client) + ClientPtr client; +{ + register int n; + REQUEST(xShmGetImageReq); + swaps(&stuff->length, n); + REQUEST_SIZE_MATCH(xShmGetImageReq); + swapl(&stuff->drawable, n); + swaps(&stuff->x, n); + swaps(&stuff->y, n); + swaps(&stuff->width, n); + swaps(&stuff->height, n); + swapl(&stuff->planeMask, n); + swapl(&stuff->shmseg, n); + swapl(&stuff->offset, n); + return ProcShmGetImage(client); +} + +static int +SProcShmCreatePixmap(client) + ClientPtr client; +{ + register int n; + REQUEST(xShmCreatePixmapReq); + swaps(&stuff->length, n); + REQUEST_SIZE_MATCH(xShmCreatePixmapReq); + swapl(&stuff->pid, n); + swapl(&stuff->drawable, n); + swaps(&stuff->width, n); + swaps(&stuff->height, n); + swapl(&stuff->shmseg, n); + swapl(&stuff->offset, n); + return ProcShmCreatePixmap(client); +} + +static int +SProcShmDispatch (client) + register ClientPtr client; +{ + REQUEST(xReq); + switch (stuff->data) + { + case X_ShmQueryVersion: + return SProcShmQueryVersion(client); + case X_ShmAttach: + return SProcShmAttach(client); + case X_ShmDetach: + return SProcShmDetach(client); + case X_ShmPutImage: + return SProcShmPutImage(client); + case X_ShmGetImage: + return SProcShmGetImage(client); + case X_ShmCreatePixmap: + return SProcShmCreatePixmap(client); + default: + return BadRequest; + } +} -- cgit v1.2.3